indian ocean tsunami of 2004 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
tsunami PowerPoint Presentation
Download Presentation
tsunami

Loading in 2 Seconds...

play fullscreen
1 / 17

tsunami - PowerPoint PPT Presentation


  • 662 Views
  • Uploaded on

Indian Ocean Tsunami of 2004

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'tsunami' - akbar


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
indian ocean tsunami of 2004

Indian Ocean Tsunami of 2004

“The Great Wave” by Katsushika Hokusai (ca. 1823–1829)

the tsunami
The Tsunami
  • Also called seismic sea wave
  • Generated by an undersea geologic event, such as a great earthquake, volcanic explosion, or underwater landslide
  • “Tsunami” in Japanese means “harbor wave”
  • Tsunamis are not “tidal waves”
subduction zone earthquake
Subduction Zone Earthquake
  • Oceanic crust collides with continental crust and is forced downward
  • Compression forces build until rock fractures and an earthquake occurs

Graphic © Strahler/Wiley 2005

generation of the tsunami
Generation of the Tsunami
  • During the earthquake, the seafloor moves upward, creating a water wave that spreads outward.

Graphic © Gerard Fryer 2003

undersea landslide or slump
Undersea Landslide or Slump
  • Body of sediment slumps downward along a continental shelf
  • Can be triggered by an earthquake
  • Water drops at head of slump, rises at toe to create a wave
  • Wave moves outward as a tsunami

Graphic © Gerard Fryer 2003

volcanic explosion
Volcanic Explosion
  • The explosive eruption of Krakatau in August 1883 created a tsunami that claimed more than 36,000 lives
the tsunami wave
The Tsunami Wave
  • The tsunami wave has a wavelength of 100–200 km with a deep water height of 1 m or less
  • Travels as fast as 200 m/s (440 mi/hr) in open ocean
  • As it approaches the shore, it slows, steepens, and rises in height

Deep ocean

Shoaling

the wave keeps coming
The Wave Keeps Coming
  • The wave acts like a temporary rise in sea level, pushing water far inland before it retreats
indian ocean tsunami of december 26 2004
Indian Ocean Tsunami of December 26, 2004
  • Caused by 9.0 earthquake beneath Java Trench, west of Sumatra, Indonesia
  • Fourth largest earthquake since 1900
  • 1000 km of fault ruptured and sea floor moved upward by about 5 m (16 ft)

Sumatra

Java Trench

banda aceh sumatra indonesia
Banda Aceh, Sumatra, Indonesia

June 23, 2004

Courtesy of DigitalGlobe

banda aceh sumatra indonesia12
Banda Aceh, Sumatra, Indonesia

Dec 28, 2004

Courtesy of DigitalGlobe

kalutara beach sri lanka
Kalutara Beach, Sri Lanka

Jan 1, 2004

Courtesy of DigitalGlobe

kalutara beach sri lanka14
Kalutara Beach, Sri Lanka

Dec 26, 2004

Courtesy of DigitalGlobe

kalutara beach sri lanka15
Kalutara Beach, Sri Lanka

Dec 26, 2004

Courtesy of DigitalGlobe

kalutara beach sri lanka16
Kalutara Beach, Sri Lanka

Dec 26, 2004

Courtesy of DigitalGlobe

the tsunami s toll
The Tsunami’s Toll
  • Deaths: >210,000
    • Indonesia: 166,000
    • Thailand: 5,000
    • Sri Lanka: 30,000
    • India: 10,000
  • Damage: >$7 billion
    • Indonesia: $4.4 billion
    • India: $1.5 billion
    • Sri Lanka: $900 million
  • Aid Donations: >$6.5 billion
    • Government pledges: $5.3 billion
    • Private donors: $1–2 billion